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| Number | Title | Issue Date |
| 8151633 | Methods and systems for characterizing LCM particle plugging and rheology in real time Methods and systems for characterizing drilling fluids laden with LCM (Lost Circulation Material) and other solid materials are disclosed. A test cell for analyzing a fluid is provided with a first conical inner portion and an axial positioning device positioned alo... | 04/10/2012 |
| 7237431 | Apparatus and method for measuring viscosity An apparatus and methods for analysis of a petroleum product, specifically determining the viscosity of a sample, are disclose. The apparatus includes a sample reservoir for receiving a liquid sample and a pressure regulator for applying hyperbaric pressure to a sam... | 07/03/2007 |
| 7169886 | Process for the control of flow properties of polymers A method for controlling the viscoelastic properties of a polymer comprising the steps of feeding a polymer melt into a first and optional subsequent means for applying a strain rate, each means for applying a strain rate being underfed or overfed according to the r... | 01/30/2007 |
| 7152484 | Sensor for detecting a physical property between two movable bodies having high tribological strain A sensor element (5) detects a physical measurement variable such as a pressure, a temperature, a capacitance, or a gap width between two bodies (10, 20) that move in relation to each other during operation and experience high tribological stress. In c... | 12/26/2006 |
| 7143637 | Dielectric slit die for in-line monitoring of liquids processing The dielectric slit die is an instrument that is designed to measure electrical, rheological, ultrasonics, optical and other properties of a flowing liquid. In one application, it is connected to the exit of an extruder, pump or mixing machine that passes liquefied ... | 12/05/2006 |
| 7114374 | Sensitive spinline-type extensional viscometer for mobile liquids employing very small liquid volumes A method for making fluid elasticity measurements using an extensional viscometer (100) is disclosed, where stress is not directly measured but is inferred from an accurate measurement of the change in the rate of flow of a liquid during passage through a ver... | 10/03/2006 |
| 7049147 | Method for process line testing An apparatus capable of characterizing the fluid content of chemicals in a reaction line comprises a rheometer. The apparatus can be connected to or included in a reaction flow stream, and has a retractable wall 26 that opens to provide an opening 28 t... | 05/23/2006 |
| 6990851 | Microfluidic viscometer Microfluidic devices, systems, and methods measure viscosity, flow times, and/or other flow characteristics within the channels, and the measured flow characteristics can be used to generate a desired flow. Multi-reservoir pressure modulator and pressure controller ... | 01/31/2006 |
| 6992590 | Systems and methods for sensing a fluid supply status A system that includes a container containing a fluid, a fluid line coupled with the container, and a pump configured to pump the fluid out of the container through the fluid line. The system further includes a sensor that includes a wireless transmitter. The sensor... | 01/31/2006 |
| 6951128 | Polymeric solutions rheometer A method for determination of the extensional rheological properties of a liquid comprises application to a sample of liquid in a closed system of a pulsed oscillatory alternating flow in a geometry creating an extension flow surrounding a stagnation point and measu... | 10/04/2005 |
| 6901789 | Method for determining parameters A method for determining parameters for the viscosity or temperature of a brake fluid of a vehicle by way of a predetermined pressure build-up within time limits in at least one defined section of a brake circuit and for detecting a pressure in the said section and/... | 06/07/2005 |
| 6796168 | Method for determining a characteristic viscosity-shear rate relationship for a fluid A method for determining the viscosity of a fluid flowing through a system at any point in the system whereby the method involves determining a characteristic relationship for the fluid between viscosity and shear rate; obtaining a shear rate of the fluid as it move... | 09/28/2004 |
| 6598465 | Electrorheological and magnetorheological fluid scanning rheometer A scanning rheometer is presented for the rheological property measurement of electrorheological (ER) and magnetorheological (MR) fluids using a non-linear viscoplastic model, based on the fluid height variation with respect to time. The rheometer basical... | 07/29/2003 |
| 6584830 | Viscosity measuring apparatus Apparatus for measuring the viscosity of a Newtonian fluid, includes a tubular housing which defines an internal cavity; a fluid restriction structure disposed in a first portion of the cavity; and a pressure measuring device disposed to measure the diffe... | 07/01/2003 |
| 6564618 | Electrorheological and magnetorheological fluid scanning rheometer A scanning rheometer is presented for the Theological property measurement of electrorheological (ER) and magnetorheological (MR) fluids using a non-linear viscoplastic model, based on the fluid height variation with respect to time. The rheometer basical... | 05/20/2003 |
| 6553325 | Method for dimensioning an elastic structure subjected to a fluid in motion The invention is a method for dimensioning or adapting an elastic structure immersed in a fluid in motion, the structure having a length Lt. The method comprises: a) the natural excitation modes of the structure and their number N are defined; b) for at l... | 04/22/2003 |
| 6484566 | Electrorheological and magnetorheological fluid scanning rheometer A scanning rheometer is presented for the rheological property measurement of electrorheological (ER) and magnetorheological (MR) fluids using a non-linear viscoplastic model, based on the fluid height variation with respect to time. The rheometer basical... | 11/26/2002 |
| 6220083 | Elongational rheometer and on-line process controller Elongational viscosity may be easily and accurately measured by observing the flow characteristics of a high viscosity fluid through a hyperbolic or semi-hyperbolic die, without lubrication of the fluid flowing through the die. The effects of developing o... | 04/24/2001 |
| 6216528 | Method and apparatus for determining a viscosity of an actuating fluid The present invention provides a method and apparatus for determining the viscosity range and/or oil grade of an actuating fluid in a fuel system. The method includes the steps of determining a flow, pressure, and temperature of the actuating fluid, and r... | 04/17/2001 |
| 6023962 | Reservoir-slit rheometer for the viscosity measurement of fast-reacting polymers A viscometer measures the rheological properties of polymers over a wide range of temperature, shear-rate and cure conditions, so that it can be used with extremely fast-changing resinous materials such as fast curing thermosets and fast crystallizing the... | 02/15/2000 |
| 5932800 | Viscosity testing device A device for testing the viscosity of a fluid contained in a cartridge comprising a tubular housing, a pair of end caps, one end cap being configured for operable connection to a piston and cylinder assembly, and the other end cap being configured to rece... | 08/03/1999 |
| 5847268 | Viscosity measuring apparatus and method A forced flow viscosity measuring apparatus includes within a housing (13), a thermostatic air chamber (11), a measurement capillary (38) and a needle (60) in fluid communication with the capillary each contained in the chamber, and a variable speed drive... | 12/08/1998 |
| 5750884 | Complex viscosity and complex modulus measurement device and method The viscometer (100) includes a difference amplifier (110) driven by a signal generator (111) which supplies a control signal to shaker (120), which is sufficiently powerful to impose such strains as may be demanded by a controlling reference voltage with... | 05/12/1998 |
| 5583284 | Method for monitoring grease consistency The invention relates to continuous grease making processes. The invention further relates a method for monitoring the consistency of the final product stream of a continuous grease making process. The finished product is passed through a venturi where a ... | 12/10/1996 |
| 5537860 | Fluid sensor including substantially linear flow resistor The volumetric flow rate of a fluid is determined essentially independently of the properties of the fluid by guiding the volumetric fluid flow to be measured through an essentially linear flow resistor. An alternating flow of the fluid is superimposed on... | 07/23/1996 |
| 5417106 | Capillary rheometer plunger pressure transducer and measurement technique A capillary rheometer apparatus includes a housing, a plunger, the housing having a reservoir for receiving the plunger in a polymer melt, and a mechanism for blocking flow of the melt out of the reservoir. A driving mechanism is included for driving the ... | 05/23/1995 |
| 5388447 | Viscosity measurement apparatus A viscosity measurement apparatus for measuring viscosity of a fluid under known pressure. A tube of known diameter and length allows the fluid to pass therethrough. A closed chamber is in fluid communication with the tube. A piston, sealably engaged with... | 02/14/1995 |
| 5383352 | Method for the measurement of bulk modulus and pressure viscosity of liquids A method is disclosed for determining bulk modulus of a liquid based on a pressure-volume-temperature relationship at constant volume corrected for changes in system volume due to elevated pressure and temperature. The apparatus used to determine bulk mod... | 01/24/1995 |
| 5357784 | Lubricated flow elongational rheometer A novel method and apparatus for measuring elongational viscosity are disclosed. It is shown that in a hyperbolic or semi-hyperbolic die geometry with lubricated flow, the elongational viscosity of a fluid can be obtained from pressure drop--flow rate dat... | 10/25/1994 |
| 5277058 | Adjustable gap rheometer An improved rheometer of the present invention includes an adjustable gap through which a flowing system is forced. The inner cavity dimension of the gap is variable so as to give a user of the rheometer an ability to vary the separation gap and the lengt... | 01/11/1994 |
| 5257529 | Method and device for measurement of viscosity of liquids A viscosity of liquids is measured by inserting one end of a fine tube into one end of a tubular vessel sealed and maintained at a reduced pressure, while dipping the other end of the fine tube in a liquid to be measured, to cause the liquid to flow into ... | 11/02/1993 |
| 5209107 | Capillary rheometer plunger pressure transducer and measurement technique A capillary rheometer including a plunger pressure transducer assembly which contains a liquid metal fill capillary passage therein. When the plunger is urged downward onto the melted polymer, a diaphragm at the end of the plunger senses the pressure with... | 05/11/1993 |
| 5202395 | Manufacturing process control and product characterization The viscous and elastic components of a viscoelastic melt, for example a polymer melt, are examined to provide information useful in quality control in the process for the manufacture of the material. Measurement of the entrance pressure drop exhibited by... | 04/13/1993 |
| 5078007 | In-line polymer melt rheometer An apparatus and a process for quickly and accurately determining in-line the rheology of molten polymer streams, said apparatus comprising a cam member and a pressure wall member, one of which is a rotating member and the other one is a stationary member... | 01/07/1992 |
| 4990293 | Process of and apparatus for extruding a reactive polymer mixture An extrusion die is described for extruding a polymer from a reactive precursor mixture without plugging of the die. The extrusion die includes a die inlet leading to at least one channel having dimensions which produce a wall shear stress value that exce... | 02/05/1991 |
| 4890482 | Method and apparatus for measuring fluid viscosity A transient flow capillary viscometer is provided for establishing a measure of the viscosity of a highly viscous test fluid. More particularly, a capillary tube filled with the test fluid is provided. The viscometer relies upon inducing a step change in ... | 01/02/1990 |
| 4833910 | Method for resin molding monitoring A lever pivoted at a support point receives force from pressure receiving members located at two positions along the direction of flow of resin in a flow passage without a metal mold. A physical property or condition of the resin flowed into the metal mol... | 05/30/1989 |
| 4798081 | High temperature continuous viscometry coupled with analytic temperature rising elution fractionation for evaluating crystalline and semi-crystalline polymers A method and apparatus for analyzing a solution of a crystalline or a semi-crystalline polymer sample to determine a crystallinity versus weight percent profile concurrently with viscosity average molecular weight. The polymer sample is first precipitated... | 01/17/1989 |
| 4680958 | Apparatus for fast determination of the rheological properties of thermoplastics Apparatus composed of a control and monitoring unit 1, a thermostated cylinder 2 receiving a measured quantity of material to be evaluated, a plunger 3 sliding in the cylinder 2, an exchanger system enabling the cylinder 2 to be equipped with a suitable d... | 07/21/1987 |
| 4574623 | Process and apparatus for measuring the flow characteristics of a flushed pigment A process and apparatus are described for measuring the flow characteristics of a non-powdered material, e.g., a flushed pigment, and correlating them with actual production practice. The non-powdered material is placed into a cylinder having an orifice a... | 03/11/1986 |
